Last updated: 2026-06-11
Linger is designed so that your data never leaves your device. This policy explains exactly what it does and does not do.
Face data is sensitive, so here is exactly how Linger handles it.
Linger does not collect or keep any photo or video of your face. When it checks whether you are present, it briefly captures camera frames into memory only, detects a face, and converts that face into a single numeric "faceprint" — a 512-number mathematical vector (a face embedding) produced entirely on your device by a bundled, offline face-recognition model. During the one-time enrollment, a short burst of frames is averaged into one such faceprint. The camera frames and the detected face are discarded from memory immediately after the faceprint is computed; they are never written to disk and never leave the app's memory.
The faceprint is used for exactly one purpose: to recognize whether the enrolled user is the person currently in front of the camera, so Linger can keep the display awake while you are present and let your computer sleep when you step away. Each check computes a fresh faceprint from the live camera and compares it (a numeric similarity match) against your stored faceprint. Face data is never used for advertising, analytics, profiling, tracking, identifying other people, or any other purpose.
Linger does not share face data with anyone. There are no third parties, no third-party SDKs, no servers, and no network transmission of any kind. The app does not even request the network-access entitlement, so it is technically incapable of sending your face data off your device. Your face data is never sold, never disclosed, and never leaves your computer.
Your faceprint (the numeric embedding plus a match threshold) is stored only locally, in a single file inside Linger's sandboxed Application Support container on your own computer. It is not stored in iCloud, on any server, or anywhere off your device.
Your faceprint is retained locally, only until you remove it. You can delete it at any time from Settings → Privacy & data → "Remove my face data", and re-enrolling replaces it. Uninstalling Linger removes it along with all of the app's local data. There is no remote copy to delete, because none is ever created.
These never leave your device and are not shared with anyone.
Linger is not directed at children and collects no data from anyone.
If this policy changes, the updated version will be posted here with a new date.
Questions about privacy: juls@yakki.ai